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文章针对水下弹性结构,提出一种识别结构内部激励力源的匹配场处理方法及基于结构辐射声场的广义拷贝场概念,并提出采用粒子群遗传融合搜索算法对最优力源强度进行匹配搜索。以水下自由声场中的单层圆柱壳体为研究对象,采用数值计算方法建立了结构辐射声场传递函数拷贝场,并对匹配搜索算法进行了数值仿真分析。在消声水池中进行了水下单层圆柱壳体辐射声场测试,将测试结果与拷贝场进行了匹配处理。仿真结果与试验结果均表明,这种力源识别匹配场处理方法可以有效地针对结构内部的力源强度进行分析排序,利用匹配识别的结果进行辐射噪声预报时,预报精度很高。
In this paper, aiming at underwater elastic structure, a matching field processing method to identify the internal excitation force source and a concept of generalized copy field based on the structural radiation field are proposed, and a hybrid genetic search algorithm based on particle swarm fusion is proposed to search the optimal strength . Taking the single cylindrical shell in underwater acoustic field as the research object, the copy field of the structure radiation acoustic function transfer function is established by numerical calculation, and the numerical simulation of the matching search algorithm is carried out. Under the anechoic pool, the underwater monolayer cylindrical shell radiation sound field test was carried out, and the test results were matched with the copy field. The simulation results and the experimental results show that this method of source identification matching field processing can effectively analyze and rank the strength of the source of force in the structure. When using the result of matching identification to predict the radiation noise, the prediction accuracy is high.